Electropneumatic control system for elevators.



' No. 693,|84. f 'TPat'ented'Febrll, I902.

Ahsumm.

ELECTROPNEUMATIG CONTROL SYSTEM F03 ELEVATORS.

(Application filed Sept. 20'. 1901 v No Model.) v s shee ts r sfheet-l.

THE NORRIS PETERS 0a., PMo'v o-umo" wnsnmu'rou. D. c.

f Patented Feb. I l, I902. I 3

A. Susan. f Y ELECTROPNEUMATIC CONTROL-SYSTEM FOR ELEVATORS.

1Application filed Sept. 20, 1901.)

' '3 S heefs-Sheet 2.

stratum v o. WASHINGYON a c No. 693J84;

' A. summ.

'Pa'tentd Feb. u, [902,-

ELEGTROPNEUMATIC' enamel. SYSTEM FOR ELEVATORS.

No Model.)

(Application filed Sept. 20, 1801.)

I l G s Sheets-Sheet}.

- U ITED STATES- PATENT OFFICE.

AUGUST SUNDII, OF YONKERS, NEW YORK, ASSIGNOR 'lO OTIS ELEYATOR OOMPANY,OF EAST ORANGE, NEW' JERSEY, A CORPORATION OF NEW JERSEY.

ELECTROPNEUMATIC CONTROL SYSTEM FOR ELEVATORS-.1.

sr'norirroa'rzolv forming part of Letters Patent No. 693,18 4, datedFebruary 11, 1902' Application filed September 20, 1901. Serial No.76,126. (No model.)

throughout the vicinity of the travel of the car, as in theelevator-Welland hallways. In

an electric elevator using high potential great precautions arenecessary for the protection of the connections to avoid danger to theoperator and users, and in the ordinary systems of electrical controlthe switches and apparatus about the car and elevator-well consume spacefor installationwhich it is not always convenient to provide.

My invention consists, primarily, in providing pneumatic connectionsbetween the car and floors or stations and the controlling apparatusproper of the motor, thus doing away the carpush-buttons.

with the necessity of extending electrical connections to the car andstations; and it also consists in providing mechanical connectionsoperated by the well-doors, instead of electrical connections, asheretofore, whereby the controlling-circuits are broken whenever thewell-doors (or any one of them) are open.-

My invention also consistsin a form of floorcontroller designed to doaway with much arcing between the contacts and provided with regulatingmeans for adjusting the parts in order that the car may be brought to astop substantially on a level with the floor.

My invention is more fully set forth in the specification and isillustrated in its many details in the accompanying drawings, in whichFigure l is a diagrammatic view of apparatus embodying my invention.Fig. 2 is a plan view of the mechanical construction of Fig. 3 is an endview thereof; Fig. etis illustrative of pneumatic means for operating aswitch. Fig. 5 is a View, partly in section, of a pneumatic pushbutton;and Fig. 6 is an end view thereof.

Fig. 7 is a view, partly in section, showing valves in the pneumaticconnections. Fig.

8 is an end view, partly in section, of the floor-controller. Fig. 9 isa side view of a de- 5 5 tail thereof. Fig. 10 is a bottom plan view ofanother detail thereof. Fig. 11 illustrates a modification of mechanicalmeans for breaking the controlling-circuits.

Referring to the drawings, A represents a motor, shown as an electricmotor, and 13' represents an elevator car or cage connected to a drum 0,operated from the motor by any suitable connections. v

Y Y Y Y represent floors or stations, of which there may be any number,each being provided with a door y, opening, asusual, upon theelevator-well.

V In order to operate the motor and to control its direction of rotationfor moving the car .upward or downward, starting, and reversingelectrical connections D are shown; but they may be of any suitablecharacter, and being'no part of my invention need notbe furtherdescribed. between the motor and a reversing-switch E, which may alsobeof any convenient character, but is preferably of that form describedin application for Letters Patent, Serial No. 660,873, filed December 6,1897, and entitled 8o Electrical operation of elevators by a singlepush-button system. In this type of reversing-switch an armature F,carrying contacts, isadapted to he swung to one side or the other of thecenter and close the proper circuits for the operation of the motor inone direction or the other, the armature F being actuated by suitableele'ctromagnets or relays D U, the arrangement being such in thisinstance that when relay D is energized it will attract the armature Fand so connect the field and armature of the motor A to the supply-mainsthat rotation will take place in a direction for moving the car Bdownward,

while if the relay U is energized the motor' 5 Connections are made 75the proper time for the car to stop at the desired floor or station, thecontrolling-circuits include a floor controller or controlling device G,included in the controlling-circuits of the motor and of a particularconstruction hereinafter to be described.

The motor and its controlling circuits and devices are controlled bypneumatic means. At each floor or station Y Y Y Y are shown pneumaticpush-buttons 1 2 3 4, and pneumatic push-buttons 1 2 3 4 are shown onthe car, while pneumatic connections are made between the push-buttonsat the stations and on the car and the motor-controlling devices, thesepneumatic connections being shown in this instance as consisting oftubes H, made of any suitable material, but preferably connected in acable H and made flexible in that portionof the connections between thecar and the landings. Other pneumatic push-buttons 5 and 6 are shown onthe car and also connected to parts of the controlling apparatus of themotor, the function of these buttons being hereinafter set forth. Theconstruction of these pneumatic push-buttons is no part of my invention,and I have merely shown by way of illustration a suitable form ofpush-button. (Illustrated in detail in Figs. 5 and 6.) A knob a is shownconnected to a suitable bulb b, fitting with an air-tight joint to oneof the tubes H, so that pressure upon the knob Ct will cause an impulseof air or vibration to pass through the tube, this impulse beingutilized to actuate a diaphragm or other suitable pneumatic device inthe tube, illustrated as a diaphragm or bulb c, Fig. 4, to which isshown connected a stem (1, sliding in a fixed part e, against whichabuts a spring e, tending to hold the stem against the diaphragm, sothat an impulse of air passing through the tube from the pneumaticbutton will cause the diaphragm or bulb c to move outward and pressoutward the stem (1. By then providing a switch with one of its contactson the stem an arrangement is produced suitable for controlling anelectric circuit from a distance.

In order that an impulse may pass through the pneumatic connections toits desired destination without escaping through those connections to afloor or station button-for instance, if a button on the car has beenoperated, and vice versa-means are provided at suitable points, as thepoints V V V V where the tubing is shown as branching, one branch ineach case going to the car and the other to a floor or station. As shownin Fig. 7, suitable valves are provided at these points, so that animpulse passing through the tube 11 would lift the valve f and passonward to its destination and would be prevented from passing throughtube H by means of a valvef.

The button 5 on the car operates a suitable diaphragm or bulb 5,arranged in connection with the motor-controlling circuits and devices,and this button 5 may be called the safety-button, since by operating itwhat will hereinafter be termed the safety-circuit is controlled,whilethe button 6 on the car controls a bulb or diaphragm 6, and this may becalled the stop-button, since its function is to break thecontrolling-circuit in case of emergency and stop the motor, and thusthe car.

Those points on the diaphragm indicated by the plus and minus signsrepresent the positive and negative'mains supplying current to the motorand to the controlling-circuits, and what I have termed mysafety-circuit may be traced as follows: Starting from the point 7 onthe positive main, connection is made through a switch L, whose functionwill hereinafter be referred to, and from thence connection is made to acircuit-breaking switch 8, controlled by the pneumatic bulb 6. Fromthence the circuit passes by a wire 9 to a suitable switch controlledbya conductive connection or stem 10, actuated by the pneumatic device5, thence through thenormally-open switch or contacts 11 12, through anelectromagnet 13 by wire 14:, through an electromagnet 15, through onewinding 16 of whatIterm mysafety-magnetS, and thence through a suitablebalancing resistance R to the negative main at point 17. The resistanceR is to prevent too much current passing through the safety-circuit.

By any suitable mechanical connection, as shown in Figs. 2 and 3, thepush-buttons 1'2 3' 4 5 on the car are so arranged that thesafety-button 5 is always operated in advance of any one of the otherbuttons on the car, so that thesafety-circuit must first be closedbefore any of the other controllingcircuits are closed. As shown, apivoted 1ever 9 is connected at one side to an arm g, adapted to forcethe safety-button 5 inward or compress it, and thus send an impulsethrough the pneumaticconnections whenever the outer end g of said leveris lifted, and it will be seen that the lever must be lifted in orderthat its broad portion g may uncover the other push-buttons on the carbefore any one of them can be operated.

By operating the safety-button 5', assuming that switches L and 8 areclosed, the impulse generated will actuate the pneumatic diaphragm ordevice 5, which, as has been stated, may be of that form shown in Fig. 4

at 0, so that the stem 10, to which is connected one contact, as 11,will be actuated to close contact between 11 and 12 and to break contactbetween the normally closed contacts 11 and 11, hereinafter to bereferred to. The safety-circuit is now completed, as described, andelectromagnets 13 15 and the coil 16 of safety-magnet S will beenergized. Coil 16 of magnet S has not, however, sufficient power toseparate contacts 18 19 of the normally closed switch 20, but magnet 15will close the normally open switch or contacts 21 22, therebycompleting a connection from one contact 22 to a branch or parallelcircuit 23 at the point 24;.

On the floor-controllerG are shown pneu inatic devices, as diaphragms orbulbs 1 2 39-4, corresponding to the buttons 1,'&c.,

' and so arranged that when an impulse is sent negative main at 17.

When the safety-button 5' has been operated to close the safety-circuit,as described, a button 1 on the car may be pressed, which will close theswitch l and complete a circuit in parallel with the safety-circuit, including' the normally closed' switch 20, normally open switch 1 audasolenoids. Each solenoid is arranged with a movable coret, normally outof contact witha movable contact'J', but adapted to be moved into elec-.trical connection with said movable-contact J in a directionsubstantially perpendicular thereto when the solenoid is energized. Whena coreis moved into contact with the movable contact J, a parallelcircuit will be I and pinion and worm and wheel withtheshaftdestination.

closed, starting from the point 26 and pass} ing through a winding 25'ona safety-magnet S, thencethro'ugh one or the other ,of'the relays' D Uto the movable cOntactYJ and thence through a core 15 and by aconnection t to thesolenoid and to the line. This movable contact J isconnected with the moving part of the apparatus, as by means of a rackof the sheave and the travel of the'movable contact is proportioned tothe travel of the car. I

' The movable contact J is shown as having an insulated portion J,whichportion is adapted to come in contact with one of the cores t and breakscontact at, the appropriate moment when the elevator-car has reached itsable contact J, as stated, is proportioned to the travel ofthe car, thedistance between the cores 2? must also be so arranged that the car istraveling between two stations during the time that the insulatedportion J is moving'between any two adjacent cores 6. a

Assuming that'the parts are in the relative position shown in thediagram in Fig. 1, with the car at the second station or second storyand at'rest, and the insulated portion J of the movable contact J isadjacent to the solenoid 3, corresponding to switch 2 and to buttons 2and 2, let it be supposed that an operator in the car desires to bringthe car to the first fioor or station, and provided that switches L and8 are closed and all of the doors of the well are closed, the operatorupon first sending an impulse through the pneumatic connections by meansof button 5 on the car will'clos'e the safety-circuit, as here-'inbet'ore described. The'n'upon pressing but- While the'travel of the.mov-

close the contacts thereof and a circuit in parallel to thesafety-circuit will be closed,istart ing from contacts 2122 andincludingthe con.-

tacts of switch 20, the contacts of switch 1",

2 ton 1 of the car switch 1 will be actuated to the solenoid 5corresponding to station 1 and through connection 8 to lineat the point17. The solenoids thereby energized will cause its armaturet to impingeupon the movable contact J, thereby closing a circuit including relay D,as hereinbefore described, starting from the point 26 and including'o'newinding 25 of the safety-magnet S. Relay D will connect themotor-circuits by mean'sfof the switch E in suchmanner that rotation ofthe ,motor will take place to move the'car downward. When the car hasreached the first floor or station, contact J having been moving at thesame time to the left, the insulated portion J will have arrivedincontact with. the core 25 of the solenoid .9, corresponding to switcli1, whereby the circuit of the relay D willbe broken and'the motorstopped. It will be seen that when the-safety-circuit is completedtheweaker'winding 16 of the safety-magnet S is energized, and when'thecircuit of onejof the relays, as D, wascompleted the stronger winding 25of the safetymagnet Swasjalso energized. The winding 25 is of suflicientstrength to separate con tacts 18 and 19 of normally closed switch '20,

and it will be seen that by breaking the'cin.

cuit of the switches 1 850., at this point interference with theoperation of we the motor from a station or landing is' ettectually pre-IOO- vented, since even though one of the switches 1", &c.,'should' beactuated a controlling'de- [vice or solenoid swouldnot thereforebeenergized to affect one of the relays D U.

' When the circuitof a relay D U is auto: matically broken to stop themotor,the'winding 25 of safety-magnet S would necessarily bedecnergized; but the winding 16 remains energized,f since thesafety-circuit remains energized after the motor has come to rest or thecar has reached its destination, and this winding 16 is of sufficientstrength tomain tain contacts 18 19 of switch 20 separated until thesafety-circnit is broken bysome ap propriate means, as by operatingthe-stopbutton 6 or by operating theswitch L; Since, therefore, switch20 is maintained open after the car has reached its destination, afterthe motor has been operatedfrom the car the car With the parts in theirnormal conditions contacts 11 and 11 are normally closed and connectionis made between these contacts and the point 24:. This arrangement ispro.- videdfor the control of the motor from the fioorsor stations, andwhen. a flooror'station push-button is operated thesafety-circuit, ashereinbefore'described, is not completed, but current passes from thepoint 7 on the positive main direct to contacts 11 11, from thence tothe point 24, through switch 20, through one of the switches 1", &c.,energizing a so lenoid s, and thereby operating one of the cores t toclose a circuit through one of the relays D U, at the same timeenergizing the winding 25 of safety-magnet S.- The motor will be thenoperated to cause the car to travel in the desired direction and'to beautomaticallystopped,as before described. The winding 25 beingenergized, it causes magnets to separate the contacts 18 19 of thenormally closed switch 20, thereby effectually prevent ing interferencewith the operation of the car during'its travel; but since thesafety-circuit is not energized in this case, therefore after therelay-circuit is broken contacts 18 and 19 will resume their normallyclosed positions,

and the motor and car may again be controlled from either the car orstations.

Limit-switches T '1" are shown adapted to break the circuit at thesupply-mains or at other suitable parts of the controlling-circuits incase the automatic controller should fail to operate or in any case ofemergency wherein the motor should continue to operate and cause the carto overrun its travel. In this case the movable contact J is adapted tostrike one of the switches T T, should its movement be continued beyondthe normal, and break the circuit and stop the'motor. A convenientarrangement for this operation is as shown, wherein the limit-switches TT are arranged at each side of the movable contact J.

As shown in Figs. 8, 9, and 10, my floor-controller consists,substantially, of a suitable carrier J arranged to slide on a suitablebase 10 and supportinga contact-piece J, insulated therefrom byinsulation 11 An insulatingsupport 12 supports the switches l", the. andthe pneumatic controlling-bulbs 1, 850. Also supported thereon onsuitable arms 13 are shown solenoids .9, having cores i, normallyretracted by springs 15 or other suitable retracting means. The coresthave projections 19, carrying contacts 25 which contacts are adapted toimpinge upon the contact-piece J and make electrical connectiontherewith. In Figs. 8 and 9 the cores 1; are shown in engagement withhubs h on the carrier J and in thearrangement of parts as assembled itwill be seen that when the cores :5 are in engagement with the hubs 7bthe contacts '6 will be withdrawn from the contact-piece J. Retractingmeans or springs 6' also tend to keep the contacts 25 out of contactwith piece J.

The carrier J is actuated, as described, from some movable part of theapparatus by means of a rack R, and as soon as the motor has started andhas moved the hubs out of engagement with the cores tan electromagnet 8may attract its core '15 and cause a contact 21 to impinge uponcontact-piece J, thus completing a circuit including one of the relays DU. As carrier J and its contact-piece J are moved to one side or theother during the operation of the motor the insulated portion J of thecontact-piece will break contact with one of the pieces 19*, thusdeenergizing a solenoid .5, which, it will be seen by reference to Fig.1, has been maintained energized after the switches 1 &c., were cut outof circuit by the operation of the safety-magnet S and .case stickingshould occur between the contacts or if a conducting-film should appearon the insulated portion J, thus prolonging the contact, a hub 71/ willraise the core 6 in any event.

It is often a difficult matter to so adjust the parts of the floorcontroller that contact will be broken and the motor stopped at just theright point to bring the car to a stop on'a level with the floor, and itwill be readily seen that unless the adjustment of the parts of thefioorcontroller is exact, 01', in other words, unless the length of timethat the operating-circuits of the motor are maintained closed is nicelyarranged to correspond to the length of time it takes a car to travelbetween stations, the car may stop a little above or a little belowafloor or station. In the form of controller herein described it isfurthermore necessary that the insulated portion Jof contact-piece Jshould be slightly wider than the contact '6 in order that the circuitmay be completely broken. Consequently there is a certain amount of timerequired for-aeontactt to cross the insulated portion J,which must beallowed for in adjusting the parts, and in the arrangement shown indiagram in Fig. 1 there is no Way provided for regulating the'tiine thata contact 25 makes electrical connection with contact-piece J. In orderthat this adjustment may be provided for, each contact 1 is arranged toswing laterally, as shown in Fig. 10. It will be seen that armsconnected to the cores '6, have a certain amount of lateral play betweenstops i and assuming that the contact-piece J is moving in the directionof the arrow in Fig. 10 during a'portion of that movement, since arm islightly pivoted in connection with the core i, the contact-piece 25 willhave no movement relative to contact J and will not slide thereon, butwill move therewith, owing to friction between the surfaces. Since thereis a definite portion of contact-piece J over which a contact i mustslide before contact is broken by the insulated portion J, and thissliding contact will consume a certain length of time, it will be seenthatif for a portion of the movement i and J move together the timeduring which they are in contact may be'prolonged. The time during whichthe contact'J and contact-piece t move together may be regulated fromzero to a maximum by means of the regulating-screws t and thus thebreaking of the circuit may be nicely timed to allow for any lost motionof the parts and tobring the car to a stop substantially on a level withthe floor.

Instead'of extending the controlling-cit 'cuits through contactscontrolled by the shown as being at the bottom of the well, and

, while different mechanical connections may adjacent to the doors.

be readily provided for operating the switch L by means ofthe doors .onesuitable form is shown in Fig. 1. A cable or rope L is suspended fromthe top of the well and is held taut by a weight W or other means andpasses Sheaves R are provided at the stations, between which the rope orcable L is adapted to sag or bulge. Between each pair of sheaves R isarranged a sheave R connected in any suitable manner with the door andengaging the rope L, so that when a door is opened the rope is caused toextend still farther between'the sheaves, thereby shortening, and thusproviding means for actuating the switch L. In this instance the turn ofthe rope is taken around a sheave R provided with a cam 1', upon whichrests a lever Z of the switch L,and any shortening of the rope caused bythe opening of a well-door will rotate the sheave R and cam 1', thusraising the lever Z and opening the contacts of the switch. Amodification of this arrangement for mechanically breaking thecontrolling-circuit by the operation of the well-doors is shown in Fig.ll, in which a weight W at the end of the rope L is adapted to rest uponthe lever land keep the contacts of the switch L closed,

while a spring Z tends to open them. Whenever the weight W, therefore,is lifted, the contacts of the switch are open and thecontrolling-circuit broken.

My invention comprises a pneumatically controlled electric motor foroperating a car or cage, and in carrying out my invention I providepneumatic means connected to the car and stations and controlling thecontrolling circuits and devices of the motor, which include relays, areversing-switch, a floorcontroller and its operating parts, and variouselectroreceptive devices and contacts forming the completemotor-controlling means. Pneumatic push-buttons are provided for thefloors or stations, while there are pneumatic push-buttons on the carcorresponding to the several doors or stations, and the pneumaticconnections include the push buttons and the controlling devicesof themotor. a

A set of pneumatic push-buttons are shown for the doors or stations, andanother set of pneumatic push-buttons arearranged on the car,thebuttonston the car corresponding to the several floors or stations,while the pneumatic connections include the push-buttons and thecontrolling devices of the motor, and

means are provided for preventing the subse quent control of the motorfrom one set of push-buttons after ithas been operated from the otherset. i

The pneumatic controlling connections and controlling devices of themotor are so arranged that when any push-button is operated thecontrolling-circuits are completed and the motor operated to bring thecar to the station corresponding to the push-button, and there can be nointerference with the operation of the motor after it is started.

It will be seen that in my apparatus there are pneumatic devices andconnections piovided forcalling and sending the car from one station toanother, operating in conjunction with electrical means for controllingthe operation of the motor. The car maybe called by the operation of thepneumatic device at a station, and it may be sent to a station by theoperation of a device in the car.

Pneumatic devices, as push-buttons, are arranged at the floors orstations, and there are pneumaticdevices on the car corresponding to thefloors or stations, with pneumatic connections, as tubes, connecting thedevices on the car with the corresponding devices at the stations, whilecommon pneumatic tubes or connections lead to the means for controllingthe operation of the motor.

In my apparatus for controlling elevators there is a safety-circuitconnected between or across the mains and controlled from the car, whichcircuit in turn controls circuits in parallel thereto, and the saidparallel circuits include electroreceptive devices controlling theoperation of the relays and startingswitch or the motor-startingdevices. The safetycircuit is normally open, and the parallel circuitsare normally open, but include normally closed contacts adapted toprevent interference after the motor has started. The safety-circuitincludes a safety-magnet which controls circuits, includingcontrolling-magnets, which in turn control the motor-starting devices.The said safety-circuit also includes an electromagnet for operatingnor-. mally open contacts of theparallel circuits, the parallel circuitsincluding, in addition to these contacts and the normally closedcontacts, other normally open contacts controlled from the car, and theclectroreceptive devices or controlling-magnets in the parallel circuitscontrol the relay-circuits, including a winding of the safety-magnetnamely, the stronger winding which operates to initially IIO open thenormally closed contacts of the interferenceswitch. The normally opensafetyoircuit controls normally open contacts of the parallel circuits,which may be termed the second circuit, and it will be seen that thecontrolling magnets of the second circuit control what may be called athird circuit, which includes the relays, and since the safety-magnetincludes windings in both the safety-circuit and this third circuit thecontacts controlled by the safety-magnet may be said to be controlled byboth the first or safety and third circuits, or, in other words, thenormally closed contacts are controlled by the joint operation of saidsafety-circuit and a third circuit, which third circuit is controlled bydevices in the second circuit. The safetycircuit is pneumaticallycontrolled from the car and controls the circuits in parallel thereto,including controlling devices and also normally open and normally closedswitches, the normally open switches also being pneumatically operatedfrom the car. The pneumatically-controlled safety-circuit between themains may also be said to control, in conjunction with pneumatic means,circuits in parallel with the safety-circuit, which parallel circuitsinclude the electroreceptive devices or electromagnets controlling thestarting and reversing switch of the motor.

\Vithout limiting myself to the precise construction and arrangement ofparts shown, I claim as my invention 1. In a controlling apparatus forelevators, the combination with a motor, car, and stations, of pneumaticdevices and connections for calling and sending the car from one stationto another operating in conjunction with electrical motor-controllingmeans, substantially as described.

2. In an apparatus forcontrollingelevators, the combination with amotor, and its electrical controlling means, of apneumaticallycontrolled floor-controller connected to said controllingmeans, substantially as described.

3. In an apparatus for controlling elevators, the combination with amotor, and its reversing-switch, of a pneumaticallycontrolledfloor-controller connected to said reversingswitch, substantially asdescribed.

at. In an apparatus for controllingelevators, the combination with amotor, car, and stations, of electrical controlling means for the motor,a floor-controller connected to said controlling means, and pneumaticmeans connected to the car and stations for controlling the operation ofthe floor-controller, substantially as described.

5. In an apparatus for controlling elevators, the combination with amotor, car, and stations, of electrical controlling means for the motor,a floor-controller connected to said controlling means, and pneumaticmeans connected to the stations for controlling the operation of thefloor-controller, substantially as described.

6. In an apparatus for controlling elevators, the combination with amotor, car, and stations, of electrical controlling means for the motor,a floor-controller connected to said controlling means, and pneumaticmeans connected to the car for controlling the operation of thefloor'controller, substantially as described.

7. The combination with a motor, car, and

stations, of electrical controlling means for the motor controlled bypneumatic means trolling means for the motor controlled by pneumaticmeans connected to the station's, substantially as described.

10. The combination with a motor, car, and stations, of electricalcircuits, switches therein controlling said motor, and pneumatic meansconnected to the car for controlling the operation of said switches,substantially as described.

11. In an apparatus for controlling elevators, the combination with amotor, car, and stations, of controlling means for the motor, pneumaticdevices for the floors or stations, pneumatic devices on the carcorresponding to the floors or stations, pneumatic connections betweenthe devices on the car and the corresponding devices at the stations,and common pneumatic connections therefrom to said motor-controllingmeans, substantially as described. 7

12. In an apparatus for controlling elevators, the combination with amotor, of a reversing-switch, a floor-controller, circuits connected tothe floor-controller and switch, and pneumatic operating devices andconnections for controlling said circuits, substantially as described.

13. In an apparatus for controlling elevators, the combination with amotor, car, and stations, of a reversing-switch for the motor, afloorcontroller,circuits connecting the floorcontroller andreversing-switch, and pneumatic operating devices and connectionsconnected to the floors or stations and car for controlling saidcircuits, substantially as de' scribed.

14. In an apparatus for controlling elevators, the combination with anelevator-motor, of pneumatic push-buttons for the floors or stations,pneumatic push-buttons on the car corresponding to the several floorsorstations, with pneumatic connections including the push-buttons andthe controlling devices of the motor for controlling the operation ofthe motor, substantially as set forth.

15. In an apparatus for controlling eleva tors, the combination with anelevator-motor,

of a set of pneumatic push-buttons for the floors or stations, a set ofpneumatic pushbuttons on the car corresponding to the several floors orstations with pneumatic connections including the push-buttons and thecontrolling devices of the motor for controlling the operation of themotor, and means for preventing the subsequent control of the motor fromone set of push-buttons after it has been operated from the other set,substantially as set forth;

16. In an apparatus for controlling elevators, the combination with anelevatorm otor, of pneumatic push-buttons. for the floors or stations,pneumatic push-buttons on the car corresponding to the'several floors orstations,

with pneumatic connections including the push-buttons and thecontrolling devices of the motor for controlling the operation of themotor, and means for preventing the subsequent control of the motor froma floor or station after it has been operated from the car and stopped,substantially as 'set forth.

17. In an apparatus for controlling elevators, the combination with amotor for operating the car in either direction, of a pneumaticpush-button for each floor or station, pneumatic push-buttons on thecarcorresponding to the several floors or stations, controlling circuitsand devices for the motor, and pneumatic controlling connections betweenthe matic controlling connections between the push-buttons and thecontrolling devices of the motor, so arranged that when any pushbuttonis operated, the controlling-circuits are completed and the motoroperated to bring the car to the station corresponding to thepush-button,.and means for preventing subsequent interference with theoperation of' the motor after it is started, substantially as set forth.

19. In an apparatus for controlling elevators, the combination with themotor for operating the car in either direction, of a pneumaticpush-button for each floor or station,

pneumatic push-buttons on the car corresponding to the several floors orstations, controlling-circuits and devices for the motor, and pneumaticcontrolling connections between the push-buttons and the controllingdevices of the motor, so arranged that when any push-button is operated,the controllingcircuits are completed and the motor operated to bringthe car to the station corresponding to the push-buttons, and means forpreventing the subsequent control of the motor from.

a floor or station, both before and after the Inotorhas come to rest,after it has been operated from the car, substantially as set forth. M

20. In an elevator,acontrolling'device comprisinga fiat contact-stripconnected to a moving part of the apparatus and having'an insulatedportion, contacts movable relative to .the stripin a directionsubstantially perpendicnlar thereto, means for causing said con ,tactsto impinge directly upon said strip,

means for withdrawing them out of contact therewith, and for normallyholding them out of contact, and auxiliary meansfor moving said contactsout of contact with the strip,

in case contact is not promptly broken, substantially as set forth. 21.In an elevator, a control device comprising a fiat contact-strip havingan insulated portion, contact-pieces movable relative to the strip in adirection substantially perpendicular thereto, normally out of contacttherewith but' adapted to impinge directly thereon, means for movingsaid contact-pieces into contact with the strip, and means on the stripfor breaking contact in case of emergency, substantially as set forth.

I 22. In an elevator, a floor controller or con trolling devicecomprising a contact-strip con- 1 nected to a moving-part of theapparatus and havingan insulated portion, armatures having contactsmovable relative to the strip in a direction substantially perpendicularthereto, normally out of contact therewith, but

ICO

adapted to impinge directly thereon, electro-' I magnets controlling theoperation of said armatures, and auxiliary means on the strip forbreaking contact, substantially as set forth. v

23. In an elevator, a'fioor controller or controlling device'comprisingacontact-strip connected to a moving part of the apparatus and having aninsulated portion, armatures having contacts movablerelative to thestrip in a directionsubstantially perpendicular thereto, normally out ofcontact therewith, but adapted'to impinge directly thereon,electromagnets'controlling the operations of said armatures, andauxiliary circuit-breaking means consisting of hubs on thestrip formoving the contacts out of contact with'the' strip, substantially as setforth. v

' 24.. In an apparatus for controlling elevators, the combination withthe car, the motor and supply-mains therefor, of a safety-circuitbetween the mains controlled from the car, and in turn controllingcircuits, in parallel to said safety-circuit, the said parallel circuitsincluding elcctroreceptive devices controlling the operation of themotor-starting devices, substantially as set forth. I 25. In anapparatus for controlling elevators, the combination with the car, themotor and supply-mains, of a normally open safetycircuit controlled fromthe car, and control- 27. In an apparatus for controlling eleva-i tors,the combination of the car, its operatingmotorand supply-mains therefor,of a safetycircuit between the mains controlled from the car andincluding a safety-magnet and a circuit-closing magnet, circuits,controlled by said safety and circuit'closing magnets, said circuitsincluding controlling-magnets controlling the starting and stopping anddirection of rotation of the motor, substantially as set forth.

28. In an apparatus for cont-rolling elevators, the combination With thecar, its operating-motor and supply-mains, of a normally opensafety-circuit controlled from the car, said safety-circuit including anelectromagnet for operating normally open contacts of parallel circuits,the said parallel circuits including normally closed contacts and othernormally open contacts controlled from the' car and also includingelectroreceptive devices, said safety-circuit including one Winding of asafety-magnet controlling the operation of the normally closed contactsof said parallel circuits, and circuits controlled by saidelectroreceptive devices, in parallel to said parallel circuits andincluding another winding of said safety-magnet and the devices forstarting the motor and for controlling its direction of rotation,substantially as set forth.

29. The combination with an elevator-car, its operating-motor andsupply-mains, of a normally open circuit controlling normally opencontacts of a second circuit including other normally open contacts andnormally closed contacts and also including controlling devicescontrolling a third circuit containing the motor-starting devices, saidnornally closed contacts being controlled by both the first and thirdcircuits, substantially as set forth.

30. .The combination with an elevator-car, its operating-motor andcontrolling-circuits, of a normally open safety-circuit controlling asecond normally open circuit in parallel thereto including controllingdevices and normally closed contacts, said normally closed contactsbeing controlled by the joint operation of said safety'circuit and athird circuit controlled by said controlling devices, substantially asset forth.

251. In an apparatus for controlling elevators, the combination with acar and its motor, of controlling means for the motor comprising acircuit controlling a second circuit in parallel thereto, said secondcircuit including normally closed contacts and controlling devicescontrolling a third circuit bridging said normally closed contacts, andmeansincluded in both the first and thirdcircuits for controlling saidnormally closed contacts of the second circuit, substantially as setforth.

32. In an apparatus for controlling elevators, the combination with thecar, its motor and supply mains, of a safety-circuit, a circuitcontrolled thereby and including controlling-switches and devicescontrolling the starting and stopping of the motor,and means for cuttingsaid controlling-switches out of circuit after the motor has started toprevent interference, substantially as set forth.

33. In an elevator-controlling apparatus, the combination with the carand electric motor and its connections, of a safety-circuit, a

circuit controlled therebyand including normally closed contacts andalso including controlling-switches and devices controlling the startingand stopping of the motor, and means for opening said normally closedcontacts tov cut out said controlling-switches to prevent interference,substantially as set forth.

34:. In apparatus for controlling elevators, the combination with theelevator-motor and its connections, of a safety-circuit, a circuitcontrolled thereby and including normally closed contacts and alsoincluding controlling switches and devices controlling other circuitsincluding the starting devices of the motor, and means controlled bysaid other circuits and the safety-circuit, for operating the normallyclosed contacts to cut out the controlling-switches after the'car hasstarted, to prevent interference, substantially as set forth.

35. In an apparatus for controlling elevators, the combination with thecar, its motor and electrical connections therefor, of a circuitincluding normally open switches, also normally closed contacts andcontrolling devices, a safety-circuit containing means for maintainingsaid normally closed contacts open after they have been initiallyopened, and circuits controlled by said controlling devices includingmotor operating devices and also including means for initially openingsaid normally closed contacts thereby preventing interference,substantially as set forth.

36. In an electropn eumatic apparatus for controlling elevators, thecombination with a car and its motor, of a pneumatically-controlledsafety-circuit which controls circuits including controlling devices andalso normally open and normally closed switches, pneumatic means foroperating said normally open switches, other circuits includingmotorcontrolling means controlled by said controllingdevices,andmeansincluded in the safety circuit and said other circuits foroperating said .normally closed switch to prevent interference,substantially as set forth.

37, In an electropneumatic apparatus for controlling elevators, thecombination with the car and its motor, of a pneumatically-controlledsafety-circuit,controlling-circuits containing controlling devices andalso normally open and normally closed switches,pneumatic means foroperating said normally open.

" pneumatic push-buttonsfor the floors or sta- .stantially as set forth.

tions, pneumatic connections between the push-buttons andmotor-controlling devices,

and means in said connections for preventing an impulse from one of aset'of buttons reaching lthose of the other set, substantially assetOI't 39. The combination with the car, stations, motor and itscontrolling devices, of a set of pneumatic push-buttons on the car, aset of pneumatic push-buttons for the floors or stations, pneumaticconnections between the push-buttons and motor-controlling devices, andvalves in said connections for preventing an impulse from one set ofbuttons reaching those of the other, substantially as set forth.

40. In an elevator, the combination with the car and motor,- ofcontrolling-circuits for the motor, and mechanical means connecting thewell-doors for controlling said controllin g-circuits, substantially asset forth.

41. In an elevator, the combination with the car and motor, ofcontrolling-circuits for the motor, and mechanical means connectingthewell-doors whereby when any door is opened the circuit isbroken,substantially as set forth.

42. In an elevator, thecombination with the car and motor, ofcontrolling-circuits for the motor, a switch in thecontrolling-circuits, and mechanical means connecting said switch andthe well-doors, whereby when any door is opened and closed thecontrolling-circuit is broken and made, substantially as set forth.

43. In an elevator, the combination with a car and motor, ofcontrolling-circuits for the motor, a switch in thecontrolling-circuits,and mechanical connection between said switch andthe well-doors whereby when any door is opened the controlling-circuitis broken, sub- 44. In an elevator,the combination with the car andmotor, of controlling-circuits for the motor, a switch in thecontrolling-circuits,and means connecting said switch with the welldoorswhereby when any door is opened, the controlling-circuit is broken,substantially as set forth.

'45. In an elevator; an electrical controlling device for determiningthe travel of the car, comprising a contact-piece connected to a movingpart of the apparatus, an insulated portion on said contact-piece, aplurality of contacts adapted to impinge upon said contact-piece,andmeans for regulating the length of time a. contact is in electricalconnection with the contact-piece, substantially as set forth.

46. In an elevator-control apparatus, an.

electrical controlling device for determining the travel of the carcomprising a contactpiece moving proportionately to the travel of thecar and con nected tot-he motor-controlling circuits, a plurality ofcontacts corresponding to a floor or station, adapted to make contactwith the contact-piece and also connected to the motor-controllingcircuits, and means for regulating the length of time electricalconnection is maintained between a contact and the contact-piece,substantially as described.

47. Inan electropneumatic apparatus for controlling elevators, thecombination with the car, the motor and supply-mains there for, .of apneumatically-controlled safety-circuit betweenthe mains, in turncontrolling in conjunction with pneumatic means, circuits in parallelwith said safety-circuit, said parallel circuits includingelectroreceptive devices controlling the operation of the m0-tor-starting devices,substantially as set forth.

48. In an electropneumatic apparatus for controlling elevators, thecombination with the car, the motor and supply-mains, of a normally opensafety-circuit controlled by pneumatic means, normally open circuitsjointly,

controlled by pneumatic means and by said safety-circuit, the saidnormally open circuits containing controlling devices and also normallyclosed contacts adapted to beopened after the motor has started toprevent interference, and the said controlling devices controllingcircuits including the motorstarting devices, substantially as setforth.

4.9. In an apparatus for controlling elevators, the combination with thecar, the motor and supply-mains, of a safety-circuit across themains,and means for controlling the same,

the said safety-circuit controlling normally open circuits includingcontrolling devices and normally closed contacts for preventinginterference after the motor has started, and the said controllingdevices controlling circuits including the motor-starting devicessubstantially as set forth. 7

50. In an apparatus for controlling elevators, the combination with thecar, the motor and supply-mains therefor, of a safety-circuit betweenthe mains, means for controlling the same, the said safety-circuit inturn controlling circuits in parallel with the same, and

the said parallel circuits including electroreceptive devicescontrolling the operation of the motor, substantially as set forth.

51. In an electropneumatic apparatus for controlling elevators, thecombination with the car, the motor andsu'pply-mains, of asafety-circuit across the mains controlled by pneumatic means from thecar, normally open circuits jointly controlled by pneumatic means fromthe car and said safety-circuit, the said normally open circuitscontaining controlling devices and also containing normally closedcontacts adapted to prevent interference after the motor is started, andthe said controlling devices controlling circuits including themotor-starting devices, substantially as set forth.

52. In an electropneumatic device for controlling elevators, thecombination of the car, its operating-motor and supply-mains therefor,of a safety-circuit controlled by pneumatic means and including asafety-magnet, circuits including controlling-magnets jointly controlledby pneumatic means and said safety-magnet, and circuits includingmotorstarting devices controlled by said controlling-magnets,substantially as set forth.

In an electropneumatic apparatus for controlling elevators, thecombination With the car and its operating-motor and supply-' mainstherefor, of a safety-circuit controlled pneumatically from the car andincluding a safety-magnet and a circuit-closing magnet, and circuitsjointly controlled by pneumatic means and by said safety and circuitclosing magnets, the said circuits including controllingmagnetscontrolling the operation of the motor, substantially as set forth.

54:. In an electropneumatic apparatus for controlling elevators, thecombination with the car, its operatingmotor and supplyinains, of anormally open safety-circuit pneumatically controlled from the car, saidsafetycircuit including an electromagnet for-operating normally opencontacts of parallel circuits, the said parallel circuits includingnormally closed contacts and other normally open contacts controlledpneumatically from the car and stations, and also electroreccptivedevices, said safety-circuit also including one Winding of asafety-magnet controlling the operation of the normally closed contactsof said parallel circuits, and circuits controlled by saidelectroreceptive devices, in parallel with said parallel circuits and including another Winding of said safety-magnet and the devices forstarting the motor and for controlling its direction of rotation,substantially as set forth.

55. The combination with an elevator-car, its OPGI'ELUHQDJOIJOI andsupply-mains,of a normally open pneuinatically-controlled circuitcontrolling normally open contacts of a second circuit including othernormally open pneumatically-controlled contacts and normally closedcontacts and alsoincluding con- 1 trolling devices controlling a thirdcircuit containing the motor-starting devices, the said normally closedcontacts being conjointly controlled by both the first and thirdcircuits, substantially as set forth.

56. The combination With an elevator-car, its operating-motor andcontrolling-circuits, of a normally open pneumatically-controlled safety-circuit controlling a second circuit in parallel thereto includingnormally open pneumatically-controlled contacts, controling devices andnormally closed contacts, the said normally closed contacts beingcontrolled by the joint operation of said safety-circuit and a thirdcircuit controlled by said controlling devices, substantially as setforth.

57. In an electropneumatic apparatus for.

controlling elevators, the combination with the car, its motor andelectrical connections therefor, of a circuit including normally openswitches, also normally closed contacts and controllingdevices,pneumatic means for controlling the said normally open switches,a pneumatically-controlled safety-circuit containing means formaintaining said normally closed contacts open after they have beeninitially opened, and circuits controlled by said controlling devicesincluding motor-operating devices, and also including means forinitially opening said normally closed contacts, thereby preventinginterference, substan tially as set forth.

58. In an apparatus for controlling eleva= tors, the combination withthe motor for operating the car, of controlling-circuits and connectionsincluding a reversing-switch and a floor-controller, thefloor-controller comprising a flat contact connectedwith the moving partof the apparatus, and having an in sulated portion, contacts adapted toimpinge upon said fiat cont-act and to be Withdrawn therefrom, and meansfor actuating said con tacts, substantially as set forth.

59. In an apparatus for controlling elevators, the combination with themotor for op erating the car, of controlling-circuits and connectionsincluding a reversing-switch and a floor-controller, saidfloor-controller comprising a movable contact having an insulatedportion, normally open contacts adapted to be brought into electricalconnection with said movable contact and to slide thereon, and means foractuating said contact, substantially as set forth.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

' AUGUST SUNDII.

Witnesses:

H. R. MARSDEN, CHARLOTTE MAcBnrou.

Correction in Letters Patent No. 693,184,

Itis hereby certified that in Letters Patent No. 693,184, grantedFebruary 11,1902,

upon the application of August Sundh, of Yonkers, New York, for animprovement in Eleotropneumatio Control Systems for Elevators, an errorappears in the printed specification requiring correction, as follows:In line 83, pageQ, the words plurality of contacts should. read contact;and that the said Letters Patent should be read with this correctiontherein that the same may conform to the record of the case in thePatent Office. I

, Signed, countersigned, and sealed this 25th day of February, A. D.,1902.

[SEAL] F. L. CAMPBELL,

- Assistant Secretary of the Interior. Countersigned v ALLEN, i

Cmmm'ssioner of Patents.

